'Independence Day 2' Times 2

The director confirms that "Independence Day 2" has two different screenplays, depending on whether or not Will Smith gets on board.

Science has Schrodinger's Cat, a thought experiment that offers a scenario wherein a cat could theoretically exist in two different states simultaneously until one state is definitively witnessed. The movie industry, it seems, has Independence Day 2, the screenplay of which currently exists in two separate versions until Will Smith decides whether or not to sign on.

In conversation with the Playlist, director Roland Emmerich admitted that there were, apparently, two different screenplays for the follow-up to the 1996 science fiction action movie -- one in which Smith returns as Captain Steven Hiller, and one in which he does not. (Emmerich's White House Down screenwriter, Jamie Vanderbilt, has written both.) These days, according to Emmerich, "it's looking good" that the version with Smith in place will be the one going forward.

Roland Emmerich: Will Smith Won't Be in 'Independence Day' Sequel

Emmerich also said that rumors about Independence Day 2 being the first of two sequels to be shot simultaneously were untrue. "I thought about spending four years of my life on one movie, but I didn't want to turn into something from the movie," he explained. "It's a movie about aliens. I don't want to turn into an alien."

Independence Day 2 -- one version thereof, at least -- is due in theaters in summer 2015.